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Thread: Powering my PC with Carnetix 1900

  1. #1
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    Powering my PC with Carnetix 1900

    Well I have an hp e-pc with laptop style power supply but am ordering the new carnetix 1900. The pinouts are as follows and was wondering why there is 12volt and 19volt on the power connector, and if anyone knows where to get this connector that would be great. Thanks Mike

    1 - plastic-filled
    2 - GROUND
    3 - GROUND
    4 - plastic-filled
    5 - +19V
    6 - PGOOD
    7 - SHIELD
    8 - +12V

  2. #2
    Low Bitrate angusn's Avatar
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    Quote Originally Posted by heartpumper
    Well I have an hp e-pc with laptop style power supply but am ordering the new carnetix 1900.


    What model e-PC do you have? I've got a 40 and I might be getting a 42 very soon. It uses a Molex connector. I purchased a second AC power supply to "play" with to get the pin-out voltages... if this is it... you just saved me a bunch of time!
    Car: 1997 VW Passat TDI moving to
    1985 Mercedes-Benz 300D
    CPU: HP ePC 1gig/256meg/250 gig
    Status: Ghetto Install w/Inverter,
    Xenarc & GPS & RadioShark
    ToGo: DC-to-DC conversion, Grease conversion

  3. #3
    Newbie stevelangford's Avatar
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    more info?

    I wonder what p-good and shield are? and in what order they go 1-9 in what order, do you have apicture?


    Quote Originally Posted by heartpumper View Post
    Well I have an hp e-pc with laptop style power supply but am ordering the new carnetix 1900. The pinouts are as follows and was wondering why there is 12volt and 19volt on the power connector, and if anyone knows where to get this connector that would be great. Thanks Mike

    1 - plastic-filled
    2 - GROUND
    3 - GROUND
    4 - plastic-filled
    5 - +19V
    6 - PGOOD
    7 - SHIELD
    8 - +12V

  4. #4
    Variable Bitrate billmee's Avatar
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    <most of this is from a different post>

    Ok, my setup has the E-PC PSU feeding the PC via a cheap terminal strip.
    I did this to figure out how much current each of the supplies was providing.
    I made these measurements, and also looked at the power good signal.

    I found the following, peak load conditions;

    19v supply 1.3 Amps
    12v supply 4.2 Amps

    Pgood aka Power Good generated by the pc when it's internal regulators are stable.
    I measured 3.3 volts on it.

    The shield is a braided uninsulated wire that uh shields the other wires in the power bundle. It shields the other wires from emi and is the ground connection from the ac outlet to the pc.

    Connect the shield to the chassis of your car.

  5. #5
    Maximum Bitrate NiSlo's Avatar
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    Mate,

    Check out the Carnetix website for that model here. It explains that it have a primary and secondary output. Primary being the 19v, the secondary being the 12v.

    Also the installation manual might help you out

  6. #6
    Variable Bitrate billmee's Avatar
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    Quote Originally Posted by NiSlo View Post
    Mate,

    Check out the Carnetix website for that model here. It explains that it have a primary and secondary output. Primary being the 19v, the secondary being the 12v.

    Also the installation manual might help you out
    NiSlo,

    Have you tried this setup with an EPC?
    The specs for the secondary output (12v) limit it to 15 watts, that was enough to scare me off.

    I also found a thread in the carnetix forum that indicated it would not work for the EPC40/42.

  7. #7
    Newbie
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    May 2009
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    ey everybody

    i know it's an old topic...

    i'm getting a e-pc 40 too

    for 19v i use a laptop charger
    but for the 12v, could i use the cigaretlighter?
    it gives a stable 13.6v....or will that be too much..?

    i also found a really cheap converter 12v - 12v / 2000 mA

    thx
    Hans

  8. #8
    Neither darque nor pervert DarquePervert's Avatar
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    Use a regulator for 12v. Don't supply the 12v straight form the vehicle's electrical system.
    The fluctuating voltage (as high as 14v and as low as 8v during crank is typical) can and will damage components that can't take it.
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  9. #9
    Newbie
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    May 2009
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    thx...

    would i be able to use a picopsu to provide 12v?
    it gives 12V 6A peak 8A +/- 3%
    http://www.mini-box.com/PicoPSU-120-...X-power-supply

    so i will only use the 12v...

    thx
    Hans

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